Ringo on X

Post your claim and mention @joinringo, in your own words. Say what you think will happen and how much you want to put on it — "@joinringo I say BTC closes above 100k on Dec 31, $20 on YES". Ringo reads it, creates the challenge, and replies confirming the exact claim, both stakes and which side you took.

Both, and you choose every time. Tag the person you want to face and the challenge is reserved for them: it waits until they accept and nobody else can take it. Post the same claim without tagging anyone and it goes up open, where any number of people can take the other side. The only thing that decides it is whether you named someone.

Reply to Ringo's post saying you are in and how much — "I'm in for $10 on NO". Quote-tweeting Ringo's confirmation works too. If there is not enough on the other side to cover your whole amount, you get filled for what is available and can top up the rest later.

No. Ringo reads plain language on X — write it the way you would say it. There is no syntax to memorize and no format to get right.

Most of what the app does: check your credits and balance, look up the status of a challenge, list the ones you have open, browse what is available to join, see who has challenged you, cancel a challenge nobody has taken yet, and check the leaderboard or your own rank.

You need a Ringo wallet to put money on a challenge, and it is created for you when you sign up with your X account. Reading along and following challenges needs nothing.

It replies telling you what was unclear rather than guessing. The most common cases are a claim with no objectively checkable answer, or an opponent handle it could not resolve — in that case it will not turn your one-on-one challenge into an open one behind your back.